Characterization of electroplated platinum-iridium alloys on the nickel-base single crystal superalloy

Yingna Wu; Aya Suzuki; Hideyuki Murakami; Seiji Kuroda

doi:10.2320/matertrans.46.2176

Characterization of electroplated platinum-iridium alloys on the nickel-base single crystal superalloy

Yingna Wu, Aya Suzuki, Hideyuki Murakami, Seiji Kuroda

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

As a high temperature protective layer, platinum-iridium alloys were electroplated on the nickel-base single crystal superalloy TMS-82+ from amidosulfuric acid solutions by the direct current method. It was found that Ir content in the films was always lower than the ratio of concentration ([Ir ³⁺]/([PtCl₆^2-] + [Ir³⁺])) in the electrolytes, indicating that preferential deposition of Pt occurred in this study. The asdeposited Pt-Ir films formed an fee single phase structure with a granular surface. When Ir content exceeded 3 at%, Pt-Ir films exhibited the 〈111〉 preferred growth orientation. It was also found that pre-deposition of Ni and Pt promoted the deposition rate and changed composition of overlaying Pt-Ir films.

Original language	English
Pages (from-to)	2176-2179
Number of pages	4
Journal	Materials Transactions
Volume	46
Issue number	10
DOIs	https://doi.org/10.2320/matertrans.46.2176
Publication status	Published - 2005 Oct
Externally published	Yes

Keywords

Direct current method
Electroplating
Ni-base superalloy
Platinum-iridium films
Pre-deposition

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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abstract = "As a high temperature protective layer, platinum-iridium alloys were electroplated on the nickel-base single crystal superalloy TMS-82+ from amidosulfuric acid solutions by the direct current method. It was found that Ir content in the films was always lower than the ratio of concentration ([Ir 3+]/([PtCl62-] + [Ir3+])) in the electrolytes, indicating that preferential deposition of Pt occurred in this study. The asdeposited Pt-Ir films formed an fee single phase structure with a granular surface. When Ir content exceeded 3 at%, Pt-Ir films exhibited the 〈111〉 preferred growth orientation. It was also found that pre-deposition of Ni and Pt promoted the deposition rate and changed composition of overlaying Pt-Ir films.",

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author = "Yingna Wu and Aya Suzuki and Hideyuki Murakami and Seiji Kuroda",

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AU - Suzuki, Aya

AU - Murakami, Hideyuki

AU - Kuroda, Seiji

PY - 2005/10

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